文献类型： 外文期刊

作者： Iqbal, Shahid ¹ ; Xu, Jianchu ¹ ; Arif, Muhammad Saleem ⁴ ; Shakoor, Awais ⁵ ; Worthy, Fiona R. ⁸ ; Gui, Heng ¹ ; Khan, Sehroon ⁹ ; Bu, Dengpan ¹⁰ ; Nader, Sadia ⁹ ; Ranjitkar, Sailesh ¹³ ;

作者机构： 1.Chinese Acad Sci, Dept Econ Plants & Biotechnol, Yunnan Key Lab Wild Plant Resources, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China

2.Chinese Acad Sci, Kunming Inst Bot, Honghe Ctr Mt Futures, Honghe 654400, Yunnan, Peoples R China

3.World Agroforestry Ctr ICRAF, East & Cent Asia Reg Off, Kunming, Yunnan, Peoples R China

4.Govt Coll Univ Faisalabad, Dept Environm Sci & Engn, Allama Iqbal Rd, Faisalabad 38000, Pakistan

5.Murdoch Univ, Ctr Sustainable Farming Syst, Food Futures Inst, Soils West, Murdoch, WA 6105, Australia

6.Teagasc, Environm Soils & Land Use Dept, Johnstown Castle Y35 Y521, Wexford, Ireland

7.Western Sydney Univ, Hawkesbury Inst Environm, Penrith, NSW 2751, Australia

8.Chinese Acad Sci, CAS Key Lab Plant Divers & Biogeog East Asia, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China

9.Univ Sci & Technol Bannu, Fac Nat Sci, Dept Biotechnol, Bannu 28100, Khyber Pakhtunh, Pakistan

10.Chinese Acad Agr Sci, State Key Lab Anim Nutr, Inst Anim Sci, Beijing 100193, Peoples R China

11.Chinese Acad Agr Sci CAAS, Ethiopian Inst Agr Res EIAR, Joint Lab Integrated Crop Tree Livestock Syst, Beijing, Peoples R China

12.World Agroforestry Ctr ICRAF, Beijing 100193, Peoples R China

13.N Gene Solut Nat Innovat, Kathmandu, Nepal

14.Lumbini Buddhist Univ, Sch Dev Studies, Devdaha, Nepal

15.Midwest Univ, Fac Humanities & Social Sci, MICD, Lalitpur, Nepal

关键词： Pakistan; Carbon dioxide; Climate warming; Methane; Nitrous oxide; Plastic residues; Soil pollution

期刊名称：ENVIRONMENTAL RESEARCH （ 影响因子：8.3； 五年影响因子：8.2 ）

ISSN： 0013-9351

年卷期： 2024 年 252 卷

页码：

收录情况： SCI

摘要： Microplastics pollution and climate change are primarily investigated in isolation, despite their joint threat to the environment. Greenhouse gases (GHGs) are emitted during: the production of plastic and rubber, the use and degradation of plastic, and after contamination of environment. This is the first meta-analysis to assess underlying causal relationships and the influence of likely mediators. We included 60 peer-reviewed empirical studies; estimating GHGs emissions effect size and global warming potential (GWP), according to key microplastics properties and soil conditions. We investigated interrelationships with microbe functional gene expression. Overall, microplastics contamination was associated with increased GHGs emissions, with the strongest effect (60%) on CH4 emissions. Polylactic-acid caused 32% higher CO2 emissions, but only 1% of total GWP. Phenolformaldehyde had the greatest (175%) GWP via 182% increased N2O emissions. Only polystyrene resulted in reduced GWP by 50%, due to N2O mitigation. Polyethylene caused the maximum (60%) CH4 emissions. Shapes of microplastics differed in GWP: fiber had the greatest GWP (66%) whereas beads reduced GWP by 53%. Films substantially increased emissions of all GHGs: 14% CO2, 10% N2O and 60% CH4. Larger-sized microplastics had higher GWP (125%) due to their 9% CO2 and 63% N2O emissions. GWP rose sharply if soil microplastics content exceeded 0.5%. Higher CO2 emissions, ranging from 4% to 20%, arose from soil which was either fine, saturated or had high-carbon content. Higher N2O emissions, ranging from 10% to 95%, arose from soils that had either medium texture, saturated water content or low-carbon content. Both CO2 and N2O emissions were 43%-56% higher from soils with neutral pH. We conclude that microplastics contamination can cause raised GHGs emissions, posing a risk of exacerbating climate-change. We show clear links between GHGs emissions, microplastics underlying mechanisms and processes.